[BenCBanks]

Fixes #748.

What changed

• Feed route maps use a 5:6 frame, about 20% taller at the same width; photos stay square and route fitting keeps start/end markers clear.
• Feed title and metadata sit over a translucent dark-navy fade. The focused UI check measures white text against a worst-case white map and requires at least 4.5:1 contrast.
• The map stats use a soft navy fade that tops out at 48% opacity, with a subtle dark text shadow so distance, pace and time stay readable without a solid blue band.
• Activity detail keeps the taller 46dvh map and runs it to the top edge. The title band, scrim and border are removed; the floating Back, share and edit controls stay over the map.
• Mapless/no-GPS cards keep their current layout.

Verification

• Focused Activity Feed checks pass at 390px and 330px in light and dark. The checks confirm the complete card, including stats and reactions, ends above the fixed tab bar; they also measure header text contrast over pure white.
• Fresh 390px Feed captures below show the full card without the tab bar.
• The 390px/330px Activity and Activity detail spacing audit previously passed with 0 violations; this follow-up changes only overlay colors and text shadows.
• Captures use fictional seeded data and local mock map tiles. No physical-iPhone check has been run.
• Full CI is rerunning for the follow-up commit.

Fresh captures